Electric condenser



Jan. 11, 1927. 3

P. R. FORTIN ELECTRIC CONDENSER Filed May 13. 1925 9m HQ t n O .F t% o nm e W M u i a P H Patented Jan. 11, 1927.

UNITED STATES PATENT QFFICE.

PAUL R. FORTIN, OF SCHENECTADY. NEVI YORK, ASSIGNOBI TO GENERAL ELECTRICCOMPANY, A CORPORATION OF NEW' YORK.

ELECTRIC CONDENSER.

Application filed May 13, 1925.

My invention relates to electric condensers, particularlv to highvoltage power air condensers, and an object of my invention is toprovide an improved condenser of this type which for a given capacityand Voltage shall he compact and shall not be subject to corona loss.

My invention will be better understood from the following descriptiontaken in connection with the accompanying drawing, and its scope will bepointed out in the appended claims.

In the drawing, 1. is a side elevation of a complete condenser involvingmy invention; Fig. 2 is a perspective view of a single element or plateof the condenser shown. in Fig. 1: Fig. 3 is a. detail of the plateshown in Fig. 2; Fig. 4 is a fragmentary view showing a condensersimilar to that illustrated by 1 but having an adjustable upper plate;Fig. 5 is a top plan of the condenser shown in Fig. 4; 6 is a crosssection of the adjustable plate of Fig. 4-,; and Fig. 7 is a detail ofthe adjusting; means.

Ref ring to the drawing, the supporting frame of the condenser comprisesupper and lower frame members 1 and 2 connected by struts S to which thecondenser plates are secured. Each ot the fixed plates 4 is showncircular in shape and comprises an external metallic ring 5 and twosheet metal di s 6 and 7. The outer surface 8 of the ring: 5 has arounded contour which in cross section is preferably the arc ot a circleand on opposite sides ot the ring are annular grooves 9 and 10.

The two disks 6 and 7 are somewhat dished and have their edges 'elcd tolit the grooves 9 and 10. By virtue of their hein dished the disks mayhe sprung into the grooves in the ring 5 and will he iiri lv heldtherein by reason o their natural re liency. A dditional security may beobtained by rolling the edge of the ring over the edge of the diskv Theplates thus formed are equally spaced at all points and each has ane..cctive thickness equal to the diameter of the rounded edge tori'nedby h The curvature of th edge and icing ct the plates. which may be elysmall. are such that with the pocrences employed the be- )lfltQ function.suliistanti ll y like 1!: to the condenser the ac i tween the spherebreak-down char .eristic oil a sphere gap Serial No. 30,072.

so that corona does not precede sparkover. By forming the grooves 9 and10 well in from the rounded outer edge of the ring 5, any unavoidableslight roughness at the junction of the ring: and the disks issufiiciently far from the. curved edge that it does not sta rt anarc-over this point.

Each condenser plate is shown provided with three equid t .nt radialsupporting arms 12 which by means of J-bolts lfl are secured to thestruts alternate plates havtheir arms secured to the same struts as willbe apparent from Fig. 1. Bv loosen.-

the J-bolts the spacing of the plates relative to each other may bereadily changed. here small adjustment of the capacitance of thecondenser is desired, the uppermost plate may be constructed andmounted, as shown 5, 6 and 7. In that case the adjustable plate 15 ismade similar to the fixed plates 4, except that instead of havingexternal supporting arms it is provided with the internal spider 16 towhichv the threaded rod 17 is secured throuqh hub 18. The bushing 19surrounds the rod 17 where it passes through the top member of the frameand between the bushine and a strap 20 is a nut 21 havinc an enlargedgrooved portion 22 for receivine belt The pin 24 carried by the rod 1'rides in longitudinal slot in the bushing 19 and Jreveuts turning of therod.

While I have described only one embodiment of my invention, I do notwish to be l...aited to the particular form shown and described, as itwill be apparent that many modifications therein may be made withoutdeparting): from the scope of my invention as set forth in the appendedclaims.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is 1. A condenser plate comprising a ring having: a rounded outersurrace and a disk secured to and bounded by said ring.

2, A condenser plate comprising a ring having); a rounded outer surface,and a pair of spaced plates secured at their peripheral portions toopposite sides of said ring.

3. A condenser plate comprising a ring having a rounded outer s ace anda pair of spaced dish d disks, said disks being in esilient engagementwith said ring at opposite sides thereof.

at. A condenser plate comprising a ring having grooves on opposite facesthereof, and

a pair of resilient spaced plates, each of said plates being dished andbeing sprung into one of said grooves.

5. A condenser comprising a series of plates in electrostatic relationwith each other, adjacent plates being uniformly spaced throughout theirextent and each having a rounded peripheral portion of approximately thesame thickness as the plates.

6. A condenser comprising a pluralita of plates, each having an edgeportion sul stantially semi-circular in cross-section and having anefiective thickness substantially equal to the diameter of the edgeportion and means for supporting said plates from their edge portions inspaced relation.

7. In a variable air condenser an adjustahlc plate. comprising a lin apair of spaced disks engaging said ring at opposite sides thereof, meansarranged between the disks and secured to the ring, and means engagingsaid means between the disks near the center thereof for moving theplate.

In witness whereof. I have hereunto set 25 my hand this llth daj of May,1925.

PAUL R. FORTIN.

